Title :
Time-Dependent Response of Field Emission by Single Carbon Nanotubes
Author :
Hagmann, M.J. ; Mousa, M.S.
Author_Institution :
New Path Res., Salt Lake City, UT
Abstract :
This paper investigates the field emission behavior by single carbon nanotubes. The DC current vs. voltage characteristics are measured for four different tubes, as well as for another sealed tube, which has a tungsten tip. Nonlinear least squares regressions of these data are used to determine Fowler-Nordheim parameters, and the work functions and the radii of the emitting tips in all five tubes are calculated. The time-dependent field emission current is measured and the magnitudes of the increase in the DC current are determined. Laser irradiation caused an increase in the DC current of 5.2% with the carbon nanotubes and 0.19% with the tungsten tip
Keywords :
carbon nanotubes; electron field emission; laser beam effects; work function; C; DC current; Fowler-Nordheim parameters; field emission time-dependent response; laser irradiation; nonlinear least squares regressions; single carbon nanotubes; tungsten tip; work function; Carbon nanotubes; Cities and towns; Educational institutions; Frequency; Least squares approximation; Least squares methods; Numerical analysis; Taylor series; Tungsten; Voltage measurement;
Conference_Titel :
Vacuum Nanoelectronics Conference, 2006 and the 2006 50th International Field Emission Symposium., IVNC/IFES 2006. Technical Digest. 19th International
Conference_Location :
Guilin
Print_ISBN :
1-4244-0401-0
DOI :
10.1109/IVNC.2006.335428
